CN206352130U - Natural qi exhaustion heavy hydrocarbon system - Google Patents
Natural qi exhaustion heavy hydrocarbon system Download PDFInfo
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- CN206352130U CN206352130U CN201621488061.8U CN201621488061U CN206352130U CN 206352130 U CN206352130 U CN 206352130U CN 201621488061 U CN201621488061 U CN 201621488061U CN 206352130 U CN206352130 U CN 206352130U
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Abstract
The utility model proposes a kind of natural qi exhaustion heavy hydrocarbon system, by the way that the raw natural gas in raw material feed channel is carried out being cooled to low-temperature condition and carried out after first time gas-liquid separation, enter back into the adsorption tower in low-temperature condition and carry out the de- heavy hydrocarbon process of cryogenic absorption, significantly improved when being adsorbed because of the adsorbent unit volume of low-temperature condition to the adsorption capacity of heavy hydrocarbon than normal temperature, so as to improve the capacity that unit volume adsorbent in adsorption tower adsorbs heavy hydrocarbon, and improve the removing precision of heavy hydrocarbon in natural gas, it is to avoid the phenomenon of the Cold box blocking and freezing in gas deliquescence process.
Description
Technical field
The utility model belongs to natural gas production technical field, more particularly to a kind of de- heavy hydrocarbon system of natural gas in low temperature absorption
System.
Background technology
Heavy hydrocarbon, refers to the hydrocarbon gas in addition to methane in natural gas, and its component is mainly pentane and heavier hydro carbons.Naturally
Gas liquefaction production refers to that gaseous natural gas is liquefied as high pressure, the liquid condition of low temperature by various refrigeration process, and by throttling
Decompression forms low pressure, the process of the liquefied natural gas of supercooled state, because containing water, carbon dioxide and heavy hydrocarbon etc. in raw natural gas
Impurity, to prevent the impurity in natural gas from core liquefaction device (ice chest) into frozen block occur, natural gas is carrying out liquefaction production
Before need to purify natural gas.At present, the purification to natural gas reclaimed water is mainly removed by Molecular Adsorption method, to day
The purification of carbon dioxide is mainly removed by methyl diethanol in right gas, and the purification to heavy hydrocarbon mainly passes through low temperature absorption method
Removed with normal temperature absorption method, the content of water is 1ppm after purification, and the content of carbon dioxide is 5ppm, and the content of heavy hydrocarbon is
The content of 1ppm, water and carbon dioxide meets the requirement that frozen block does not occur, and the content of heavy hydrocarbon can not be met, and wanting for frozen block does not occur
Ask, once occurring frozen block, whole natural gas liquefaction production line can be caused to stop, influence production efficiency and operating cost.Wherein, take off
Except the low temperature absorption method of heavy hydrocarbon is to absorb heavy hydrocarbon gas using solvent is the solution of isopentane, normal temperature absorption method is by activity
Charcoal adsorbs heavy hydrocarbon gas under normal temperature condition, the operating cost of above two method and once invests all higher, and can not
Meet the required precision that frozen block does not occur.
The U of Chinese patent CN 23728789 disclose a kind of natural gas de-heavy hydrocarbon apparatus, including the first drying tower (T1) and
Both second drying tower (T2), the first drying tower and the second drying tower are alternately at adsorption process and regenerative process, and the 3rd is dry
Dry tower (T3) (that is, aiding in drying tower), heater (E1), regeneration gas gas-liquid separator (V1), regeneration gas precooler (E2) is low
Warm regeneration gas gas-liquid separator (V2), flash chamber of natural gas (V3), and ice chest (X1), by the device, natural gas is de-
Most of heavy hydrocarbon in the adsorbent bed middle removing gas of heavy hydrocarbon tower, then enters the further remaining weight of cryogenic separation removing in ice chest
C6 and C6+ heavy hydrocarbon components are removed to the soluble degree of LNG in hydrocarbon, the natural gas after processing；For taking off the regeneration of heavy hydrocarbon tower
Regeneration gas is derived from process gas, successively it is pre-cooled but, be partially separated cryogenic separation heavy hydrocarbon in heavy hydrocarbon, ice chest, regeneration gas can be made
Body completes that when regeneration is returned in process gas excessive heavy hydrocarbon will not be carried, and reduces the load and plant investment expense of de- heavy hydrocarbon tower
With solving the problems, such as source and the whereabouts of regeneration gas, and the utility model good purification, each several part operation index is more clear
It is clear clear, easily-controllable.But natural gas de-heavy hydrocarbon apparatus of the present utility model uses and removing weight is further cooled down after normal temperature absorption method
The method of hydrocarbon, during because of normal temperature the adsorbent such as activated carbon adsorb heavy hydrocarbon finite capacity, when gas discharge than it is larger when, will certainly
Increase the volume of drying tower, inevitably increase investment and operating cost.
Therefore, a kind of natural qi exhaustion heavy hydrocarbon system having compared with Low investment and operating cost is designed, and be disclosure satisfy that
The required precision of frozen block does not occur, is very important for a person skilled in the art.
Utility model content
The utility model is directed to the investment of natural gas de-heavy hydrocarbon apparatus in the prior art and operating cost is higher and removing is smart
Degree can not meet the technical problem for the requirement that frozen block does not occur, propose a kind of natural qi exhaustion having compared with Low investment and operating cost
Heavy hydrocarbon system, and disclosure satisfy that the required precision for not occurring frozen block.
In order to achieve the above object, the technical solution adopted in the utility model is：
A kind of natural qi exhaustion heavy hydrocarbon system, including can alternately adsorb successively, cool down and heating process first absorption
Tower, the second adsorption tower and the 3rd adsorption tower, and can cooled natural gas ice chest, wherein, ice chest is connected with the first knockout drum,
The top of one knockout drum is connected with the top of the first adsorption tower, the second adsorption tower and the 3rd adsorption tower respectively, the first knockout drum
Bottom be connected with can collect discharge heavy hydrocarbon the heavy hydrocarbon port of export；The top of first adsorption tower, the second adsorption tower and the 3rd adsorption tower
Portion is further connected with regeneration Gas Cooler, and the outlet of regeneration Gas Cooler is connected with the second knockout drum, the top of the second knockout drum
Portion is connected with the top of the first adsorption tower, the second adsorption tower and the 3rd adsorption tower respectively, and the bottom of the second knockout drum is connected with
The heavy hydrocarbon port of export of discharge heavy hydrocarbon can be collected；The bottom of first adsorption tower, the second adsorption tower and the 3rd adsorption tower is connected with ice chest
Connect, ice chest, which is further connected with, can store the storage tank of liquefied natural gas；First adsorption tower, the second adsorption tower and the 3rd adsorption tower
Bottom is further connected with regeneration hot-air heater.
Preferably, the first refrigerant tubing and second refrigerant pipe of heat can be absorbed from ice chest by being provided with ice chest
Road, and can be to the exothermic raw material feed channel of ice chest and condensation pipe；Being provided with regeneration hot-air heater can be from regeneration gas
The regeneration gas heating pipe of heat is absorbed in heater, and can be to the regeneration exothermic heating agent pipeline of hot-air heater；Again
The 3rd refrigerant tubing of heat can be absorbed out of regeneration Gas Cooler by being provided with angry cooler, and can be to regeneration air cooling
But the exothermic regeneration gas cooling pipe of device.
Preferably, the outlet of raw material feed channel is connected with the entrance of the first knockout drum, the outlet at bottom of the first knockout drum
It is connected with the heavy hydrocarbon port of export, the top exit of the first knockout drum is connected with flow control valve V4 entrance；Flow control valve V4's
Outlet passes through sequencing valve V11, sequencing valve V21 and sequencing valve V31 and the first adsorption tower, the second adsorption tower and the 3rd adsorption tower respectively
Top be connected, the bottom of the first adsorption tower, the second adsorption tower and the 3rd adsorption tower passes through sequencing valve V12, sequencing valve V22 respectively
It is connected with sequencing valve V32 with the entrance of condensation pipe, the outlet of condensation pipe is connected with storage tank.
Preferably, flow control valve V4 entrance further passes through sequencing valve V13, sequencing valve V23 and sequencing valve respectively
V33 is connected at the top of the first adsorption tower between sequencing valve V11, at the top of the second adsorption tower between sequencing valve V21, the 3rd absorption
Between top of tower and sequencing valve V31；First adsorbs between tower bottom and sequencing valve V12, second adsorbs tower bottom and sequencing valve V22
Between, the 3rd absorption tower bottom and sequencing valve V32 between respectively pass through sequencing valve V14, sequencing valve V24, sequencing valve V34 with regeneration
The entrance of gas heating pipe is connected.
Preferably, the outlet of regeneration gas heating pipe is connected by sequencing valve V15, sequencing valve V25, sequencing valve V35 respectively
Be connected between the first absorption tower bottom and sequencing valve V14, second absorption tower bottom and sequencing valve V24 between, the 3rd adsorption tower bottom
Between portion and sequencing valve V34.
Preferably, at the top of the first adsorption tower between sequencing valve V13, at the top of the second adsorption tower between sequencing valve V23,
Pass through sequencing valve V16, sequencing valve V26, sequencing valve V36 and regeneration air cooling at the top of 3rd adsorption tower respectively between sequencing valve V33
But the entrance of pipeline is connected.
Preferably, the outlet of regeneration gas cooling pipe is connected with the entrance of the second knockout drum, the top of the second knockout drum
Outlet is connected with flow control valve V4 outlet, and the outlet at bottom of the second knockout drum is connected with the heavy hydrocarbon port of export.
Preferably, further comprising to carry out being provided with the regeneration gas heat exchanger of cold and hot exchange, regeneration gas heat exchanger
The first heat exchange pipeline of heat can be absorbed from regeneration gas heat exchanger, and can be changed to regeneration gas heat exchanger exothermic second
Hot channel.
Preferably, the entrance of the first heat exchange pipeline passes through sequencing valve V14, sequencing valve V24, sequencing valve V34 connections respectively
Between sequencing valve V15 and sequencing valve V12, between sequencing valve V25 and sequencing valve V22, between sequencing valve V35 and sequencing valve V32,
The outlet of first heat exchange pipeline is connected with the entrance of regeneration gas heating pipe；The entrance of second heat exchange pipeline passes through sequencing valve respectively
V16, sequencing valve V26, sequencing valve V36 are connected at the top of the first adsorption tower between sequencing valve V13, at the top of the second adsorption tower and journey
Between control valve V23, at the top of the 3rd adsorption tower between sequencing valve V33, outlet and the regeneration gas cooling pipe of the second heat exchange pipeline
Entrance be connected.
Preferably, the first adsorption tower, the second adsorption tower and the 3rd adsorption tower are provided with one or two adsorbents
Bed, adsorbent bed is active carbon layer.
Compared with prior art, advantage of the present utility model and good effect are：
1st, natural qi exhaustion heavy hydrocarbon system of the present utility model, it to raw natural gas by being cooled down and first time gas-liquid
It is delivered to again in the adsorption tower of low-temperature condition after separation and carries out cryogenic absorption, is improved unit volume adsorbent in adsorption tower and adsorb
The capacity of heavy hydrocarbon, and improve the removing precision of heavy hydrocarbon in natural gas, it is to avoid Cold box blocking and freezing in gas deliquescence process
Phenomenon.
2nd, natural qi exhaustion heavy hydrocarbon system of the present utility model, it can alternately be adsorbed, cooled down and added successively by setting
The first adsorption tower, the second adsorption tower and the 3rd adsorption tower of thermal process, can be adsorbed and regenerative process incessantly, be improved
The operational efficiency of natural qi exhaustion heavy hydrocarbon system of the present utility model.
3rd, natural qi exhaustion heavy hydrocarbon system of the present utility model, it can be such that cold renewal gas enters with heat of mixing regeneration gas by setting
The regeneration gas heat exchanger of row heat exchange, is conducive to the recovery of cold and heat, reduces natural qi exhaustion heavy hydrocarbon system of the present utility model
The operating cost of system.
Brief description of the drawings
Fig. 1 is the system diagram of embodiment 1 of natural qi exhaustion heavy hydrocarbon system of the present utility model；
Fig. 2 is the system diagram of embodiment 2 of natural qi exhaustion heavy hydrocarbon system of the present utility model.
Above in each figure：1st, raw material feed channel；2nd, condensation pipe；3rd, the first refrigerant tubing；4th, second refrigerant pipeline；
5th, ice chest；6th, the first heavy hydrocarbon knockout drum；7th, the first adsorption tower；8th, the second adsorption tower；9th, the 3rd adsorption tower；10th, regeneration gas exchanges heat
Device；11st, hot-air heater is regenerated；12nd, Gas Cooler is regenerated；13rd, the second heavy hydrocarbon knockout drum.
Embodiment
Below, the utility model is specifically described by exemplary embodiment.It should be appreciated, however, that not having
In the case of being further discussed below, element, structure and features in an embodiment can also be advantageously incorporated into other implementations
In mode.
, it is necessary to which what is illustrated is in description of the present utility model：For pipeline, pipeline flow-direction shown in accompanying drawing 1
Initiating terminal is entrance, and the end of pipeline flow-direction is outlet；For device, the pipeline being connected shown in accompanying drawing 1 with the device
The end of flow direction is entrance, and the initiating terminal of pipeline flow-direction is outlet.Term " interior ", " outer ", " on ", " under ", "front", "rear" etc. refer to
The orientation or position relationship shown is, based on the position relationship shown in accompanying drawing 1, to be for only for ease of description the utility model and simplification
Description, rather than indicate or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore it is not intended that to limitation of the present utility model.In addition, term " first ", " second " are only used for describing purpose, without
It is understood that to indicate or imply relative importance.
Referring to Fig. 1, Fig. 1 is the system diagram of embodiment 1 of natural qi exhaustion heavy hydrocarbon system of the present utility model.As shown in figure 1, one
Kind natural qi exhaustion heavy hydrocarbon system, including can alternately adsorb, cool down and the first adsorption tower 7, second of heating process is inhaled successively
The attached adsorption tower 9 of tower 8 and the 3rd, and can cooled natural gas ice chest 5, wherein, ice chest 5 is connected with the first knockout drum 6, first point
Top of the top respectively with the first adsorption tower 7, the second adsorption tower 8 and the 3rd adsorption tower 9 from tank 6 is connected, the first knockout drum 6
Bottom be connected with can collect discharge heavy hydrocarbon the heavy hydrocarbon port of export；First adsorption tower 7, the second adsorption tower 8 and the 3rd adsorption tower 9
Top is further connected with regeneration Gas Cooler 12, and the outlet of regeneration Gas Cooler 12 is connected with the second knockout drum 13, second point
Top of the top respectively with the first adsorption tower 7, the second adsorption tower 8 and the 3rd adsorption tower 9 from tank 13 is connected, the second knockout drum
13 bottom, which is connected with, can collect the heavy hydrocarbon port of export of discharge heavy hydrocarbon；First adsorption tower 7, the second adsorption tower 8 and the 3rd adsorption tower 9
Bottom be connected with ice chest 5, ice chest 5, which is further connected with, can store the storage tank of liquefied natural gas；First adsorption tower 7, second
The bottom of the adsorption tower 9 of adsorption tower 8 and the 3rd is further connected with regeneration hot-air heater 11.
Natural qi exhaustion heavy hydrocarbon system of the present utility model, by being cooled down to the raw natural gas in raw material feed channel 1
And carry out after first time gas-liquid separation, the primary purification natural gas of low-temperature condition is low into the adsorption tower progress in low-temperature condition
The de- heavy hydrocarbon process of temperature absorption, is significantly carried when being adsorbed because of the unit volume adsorbent of low-temperature condition to the adsorption capacity of heavy hydrocarbon than normal temperature
Height, so that improving unit volume adsorbent in adsorption tower adsorbs the capacity of heavy hydrocarbon, and improves the removing of heavy hydrocarbon in natural gas
Precision, it is to avoid the phenomenon of ice chest 5 frozen block in gas deliquescence process.Meanwhile, the first adsorption tower 7, the second adsorption tower 8 and
Three adsorption towers 9 can alternately be adsorbed, cooled down and heating process successively, the absorption of heavy hydrocarbon can be carried out incessantly and regenerated
Journey, improves the operational efficiency of natural qi exhaustion heavy hydrocarbon system of the present utility model.
With continued reference to Fig. 1, as shown in figure 1, the first refrigerant pipe of heat can be absorbed from ice chest 5 by being provided with ice chest 5
Road 3 and second refrigerant pipeline 4, and can be to the exothermic raw material feed channel 1 of ice chest 5 and condensation pipe 2.Regeneration gas is heated
The regeneration gas heating pipe 8 of heat can be absorbed from regeneration hot-air heater 11 by being provided with device 11, and can be heated to regeneration gas
The exothermic heating agent pipeline 7 of device 11.Heat can be absorbed out of regeneration Gas Cooler 12 by being provided with regeneration Gas Cooler 12
The 3rd refrigerant tubing, and can to regeneration the exothermic regeneration gas cooling pipe of Gas Cooler 12.
Specifically, the outlet of raw material feed channel 1 is connected with the entrance of the first knockout drum 6, the outlet at bottom of the first knockout drum 6
It is connected with the heavy hydrocarbon port of export, the top exit of the first knockout drum 6 is connected with flow control valve V4 entrance；Flow control valve V4's
Outlet is connected by sequencing valve V11 with the top of the first adsorption tower 7, and flow control valve V4 outlet passes through sequencing valve V21 and the
The top of two adsorption towers 8 is connected, and flow control valve V4 outlet is connected by sequencing valve V31 with the top of the 3rd adsorption tower 9；The
The bottom of one adsorption tower 7 is connected by sequencing valve V12 with the entrance of condensation pipe 2, and the bottom of the second adsorption tower 8 passes through sequencing valve
V22 is connected with the entrance of condensation pipe 2, and the bottom of the 3rd adsorption tower 9 is connected by sequencing valve V32 with the entrance of condensation pipe 2；
The outlet of condensation pipe 2 is connected with storage tank.
Further, flow control valve V4 entrance further by sequencing valve V13 be connected to the top of the first adsorption tower 7 with
Between sequencing valve V11, flow control valve V4 entrance is further connected to the top of the second adsorption tower 8 and journey by sequencing valve V23
Control between valve V21, flow control valve V4 entrance further by sequencing valve V33 be connected to the top of the 3rd adsorption tower 9 with it is program control
Between valve V31；Pass through sequencing valve V14 and the entrance of regeneration gas heating pipe 8 between the bottom of first adsorption tower 7 and sequencing valve V12
It is connected, passes through the 11st sequencing valve V24 and the entrance of regeneration gas heating pipe 8 between the bottom of the second adsorption tower 8 and sequencing valve V22
It is connected, passes through the 12nd sequencing valve V34 and the entrance of regeneration gas heating pipe 8 between the bottom of the 3rd adsorption tower 9 and sequencing valve V32
It is connected.
Further, the outlet of regeneration gas heating pipe 8 is connected to the bottom of the first adsorption tower 7 by the 13rd sequencing valve V15
Between portion and sequencing valve V14, the outlet of regeneration gas heating pipe 8 is connected to the bottom of the second adsorption tower 8 and the by sequencing valve V25
Between 11 sequencing valve V24, the outlet of regeneration gas heating pipe 8 is connected to the bottom of the 3rd adsorption tower 9 and the by sequencing valve V35
Between 12 sequencing valve V34.
Further, sequencing valve V16 and regeneration gas cooling pipe 1 are passed through between the top of the first adsorption tower 7 and sequencing valve V13
Entrance be connected, pass through sequencing valve V26 and regeneration gas cooling pipe 1 entrance between the top of the second adsorption tower 8 and sequencing valve V23
It is connected, the top of the 3rd adsorption tower 9 with passing through sequencing valve V36 and regeneration gas cooling pipe 1 entrance phase respectively between sequencing valve V33
Even.
Further, the outlet of regeneration gas cooling pipe 1 is connected with the entrance of the second knockout drum 13, the second knockout drum 13
Top exit is connected with flow control valve V4 outlet, and the outlet at bottom of the second knockout drum 13 is connected with the heavy hydrocarbon port of export.
With continued reference to Fig. 1, as shown in figure 1, the first refrigerant tubing 3, the refrigerant tubing of second refrigerant pipeline 4 and the 3rd
It is connected respectively with low-temperature receiver, to provide cold for the first refrigerant tubing 3, the refrigerant tubing of second refrigerant pipeline 4 and the 3rd；
Heating agent pipeline 7 is connected with thermal source, to provide heat for heating agent pipeline 7.
The operational process of natural qi exhaustion heavy hydrocarbon system of the present utility model is as follows：
Raw natural gas enters from the entrance of raw material feed channel 1 in ice chest 5 be cooled in -30 DEG C, raw natural gas
A part of heavy hydrocarbon liquefaction turn into liquid, not liquefied raw natural gas turn into primary purification natural gas；Raw material day after cooling
Right gas enters the first knockout drum 6 from the outlet of raw material feed channel 1 and carries out first time gas-liquid separation, and the heavy hydrocarbon of liquid condition is through first point
Outlet at bottom from tank 6 is delivered to the port of export for discharging heavy hydrocarbon；The primary purification natural gas of gaseous state is separated from first
The top exit of tank 6 is divided into two-way in the presence of flow control valve V4, and the primary purification natural gas of main road is from flow control valve
V4 outlet is delivered to the adsorption tower in adsorbed state, and the primary purification natural gas on secondary road is delivered to as cold renewal gas treats cold
But adsorption tower.Flow control valve V4 presets aperture：Main road is 90% primary purification natural gas, and secondary road is 10% once
Purified natural gas.
When the first adsorption tower 7 be absorption, the second adsorption tower 8 be cooling, the 3rd adsorption tower 9 be heating when, sequencing valve V11,
Sequencing valve V12, sequencing valve V23, the 11st sequencing valve V24, sequencing valve V35 and sequencing valve V36 are in open mode, and remaining is program control
Valve is closed.The primary purification natural gas of main road enters the first adsorption tower 7 through sequencing valve V11 from top, is inhaled first
Heavy hydrocarbon gas is adsorbed by adsorbent in attached tower 7, and natural gas not to be adsorbed turns into primary purification natural gas from the first adsorption tower 7
Bottom is discharged, by sequencing valve V12 enter condensation pipe 2 and in ice chest 5 condensation turn into liquefied natural gas, and be delivered to and be used for
The storage tank of liquefied natural gas is stored, adsorption process preset time is 8 hours.
Meanwhile, the cold renewal gas on secondary road enters the second adsorption tower 8, the cold renewal of low-temperature condition through sequencing valve V23 from top
Gas carries out cold blowing from top to the second adsorption tower 8, so that the second adsorption tower 8 cools, completes cooling procedure, cooling procedure
Preset time is 8 hours, so that the second adsorption tower 8 cools to -30 DEG C, it is to carry out absorption in next cyclic process to do
Prepare.
Cold renewal gas after cold blowing is delivered to regeneration gas heating tube from the sequencing valve V24 of 8 bottom of the second adsorption tower the 11st
Road 8, cold renewal gas regeneration hot-air heater 11 in be heated to 260 DEG C turn into hot recycling gas, hot recycling gas through sequencing valve V35 from
Bottom enters the 3rd sequencing valve T3 and carries out heat temperature raising to the 3rd sequencing valve T3, make the heavy hydrocarbon of absorption in the 3rd sequencing valve T3 because
Temperature rises and desorbed, and the top discharge mixed with hot recycling gas from the 3rd adsorption tower 9 turns into the heat of mixing again
Anger, completes heating process, i.e. desorption process.The preset time of heating process is 8 hours.
Heat of mixing regeneration gas enters regeneration gas cooling pipe, and the cooled drop in regeneration Gas Cooler through sequencing valve V36
Temperature turns into the heavy hydrocarbon in mixing cold renewal gas, mixing cold renewal gas to -30 DEG C and is liquefied as liquid；Cold renewal gas is mixed from again
Angry cooling pipe outlet is delivered to the second knockout drum 13 and carries out second of gas-liquid separation, and the heavy hydrocarbon of liquid condition is separated from second
The bottom of tank 13 is delivered to the port of export for discharging heavy hydrocarbon；Cold renewal gas after second of gas-liquid separation is from the second knockout drum 13
Top exit is delivered to flow control valve V4 outlet, and the suction of subsequent cycle is carried out after being mixed with the primary purification natural gas of main road
Attached process, further to remove the heavy hydrocarbon in cold renewal gas, it is ensured that the removing precision and purified natural gas liquefaction process of heavy hydrocarbon
Frozen block does not occur for middle ice chest.
When the first adsorption tower 7 be heating, the second adsorption tower 8 be absorption, the 3rd adsorption tower 9 be cooling procedure when, sequencing valve
V21, sequencing valve V22, sequencing valve V33, the 12nd sequencing valve V34, the 13rd sequencing valve V15, sequencing valve V16 are in open shape
State, remaining sequencing valve is closed.Primary purification natural gas, purified natural gas, cold renewal air and heat regeneration gas, the heat of mixing
Regeneration gas and the flow direction of mixing cold renewal gas are correspondingly adjusted according to the opening and closing of corresponding sequencing valve, will not be repeated here.
When the first adsorption tower 7 be cooling, the second adsorption tower 8 be heating, the 3rd adsorption tower 9 be adsorption process when, sequencing valve
V31, sequencing valve V32, sequencing valve V13, sequencing valve V14, sequencing valve V25, sequencing valve V26 are in open mode, remaining sequencing valve
It is closed.Primary purification natural gas, purified natural gas, cold renewal air and heat regeneration gas, heat of mixing regeneration gas and mixing are cold
The flow direction of regeneration gas is correspondingly adjusted according to the opening and closing of corresponding sequencing valve, will not be repeated here.
Referring to Fig. 2, Fig. 2 is the system diagram of embodiment 2 of natural qi exhaustion heavy hydrocarbon system of the present utility model.As shown in Fig. 2 this
The natural qi exhaustion heavy hydrocarbon system of utility model further comprises that the regeneration gas heat exchanger 10 of cold and hot exchange, regeneration gas heat exchange can be carried out
The first heat exchange pipeline of heat can be absorbed from regeneration gas heat exchanger 10 by being provided with device 10, and can be to regeneration gas heat exchanger 10
Exothermic second heat exchange pipeline.
Specifically, the entrance of the first heat exchange pipeline is connected to the 13rd sequencing valve V15 and sequencing valve by sequencing valve V14
Between V12, the entrance of the first heat exchange pipeline is connected between sequencing valve V25 and sequencing valve V22 by the 11st sequencing valve V24,
The entrance of first heat exchange pipeline is connected between sequencing valve V35 and sequencing valve V32 by the 12nd sequencing valve V34, the first heat exchange
The outlet of pipeline is connected with the entrance of regeneration gas heating pipe 8.The entrance of second heat exchange pipeline is connected by the 16th sequencing valve V1 6
It is connected between the top of the first adsorption tower 7 and sequencing valve V13, the entrance of the second heat exchange pipeline is connected to second by sequencing valve V26
Between the top of adsorption tower 8 and sequencing valve V23, the entrance of the second heat exchange pipeline is connected to the 3rd adsorption tower 9 by sequencing valve V36 and pushed up
Between portion and sequencing valve V33, the outlet of the second heat exchange pipeline is connected with the entrance of regeneration gas cooling pipe 1.
In the present embodiment, the cold renewal gas after cold blowing is delivered to the first heat exchanger tube from cooled absorption tower bottom
Road, and absorption heat is delivered to regeneration gas heating pipe 8 again after being preheated in regeneration gas heat exchanger 10, and add in regeneration gas
Further heated in hot device 11；Heat of mixing regeneration gas after desorption is just delivered to second at the top of heated adsorption tower certainly
Heat exchange pipeline, and releasing heat be delivered to again after precooling in regeneration Gas Cooler 12 further in regeneration gas heat exchanger 10
Cooling.
From the foregoing, it will be observed that cold renewal gas is exchanged heat with heat of mixing regeneration gas in regeneration gas heat exchanger 10, make cold renewal gas
Absorbed from heat of mixing regeneration gas after heat is preheated and be delivered to regeneration hot-air heater 11 again, while entering heat of mixing regeneration gas
Regeneration Gas Cooler 12 is delivered to after row precooling again, is conducive to the recovery of cold and heat, is reduced of the present utility model natural
The operating cost of qi exhaustion heavy hydrocarbon system.
Further, in order to further improve the adsorption efficiency of cryogenic absorption, the first adsorption tower 7, the second adsorption tower 8 and
The adsorbent bed of three adsorption towers 9 is to have one or two, wherein, adsorbent bed is active carbon layer.
Claims (10)
1. a kind of natural qi exhaustion heavy hydrocarbon system, it is characterised in that：Including can alternately adsorbing, cooling down successively and heating process
First adsorption tower (7), the second adsorption tower (8) and the 3rd adsorption tower (9), and can cooled natural gas ice chest (5),
Wherein, ice chest (5) is connected with the first knockout drum (6), the top of the first knockout drum (6) respectively with the first adsorption tower (7),
Two adsorption towers (8) be connected at the top of the 3rd adsorption tower (9), the bottom of the first knockout drum (6) be connected with can collect discharge weight
The heavy hydrocarbon port of export of hydrocarbon；
The top of first adsorption tower (7), the second adsorption tower (8) and the 3rd adsorption tower (9) is further connected with regeneration Gas Cooler
(12), the outlet of regeneration Gas Cooler (12) is connected with the second knockout drum (13), and the top of the second knockout drum (13) is respectively with the
One adsorption tower (7), the second adsorption tower (8) be connected at the top of the 3rd adsorption tower (9), the connection of the bottom of the second knockout drum (13)
There is the heavy hydrocarbon port of export that can collect discharge heavy hydrocarbon；
The bottom of first adsorption tower (7), the second adsorption tower (8) and the 3rd adsorption tower (9) is connected with ice chest (5), and ice chest (5) enters
One step, which is connected with, can store the storage tank of liquefied natural gas；
The bottom of first adsorption tower (7), the second adsorption tower (8) and the 3rd adsorption tower (9) is further connected with regeneration hot-air heater
(11)。
2. natural qi exhaustion heavy hydrocarbon system according to claim 1, it is characterised in that：Being provided with ice chest (5) can be from ice chest
(5) the first refrigerant tubing (3) and second refrigerant pipeline (4) of heat are absorbed in, and can be exothermic to ice chest (5)
Raw material feed channel (1) and condensation pipe (2)；Being provided with regeneration hot-air heater (11) can absorb from regeneration hot-air heater (11)
The regeneration gas heating pipe of heat, and can be to regeneration hot-air heater (11) exothermic heating agent pipeline；Regenerate air cooling
The 3rd refrigerant tubing of heat can be absorbed out of regeneration Gas Cooler (12) by being provided with device (12), and can be to regeneration air cooling
But the exothermic regeneration gas cooling pipe of device (12).
3. natural qi exhaustion heavy hydrocarbon system according to claim 2, it is characterised in that：The outlet of raw material feed channel (1) and the
The entrance of one knockout drum (6) is connected, and the outlet at bottom of the first knockout drum (6) is connected with the heavy hydrocarbon port of export, the first knockout drum (6)
Top exit is connected with flow control valve V4 entrance；Flow control valve V4 outlet passes through sequencing valve V11, sequencing valve respectively
V21 and sequencing valve V31 is connected with the top of the first adsorption tower (7), the second adsorption tower (8) and the 3rd adsorption tower (9), the first absorption
The bottom of tower (7), the second adsorption tower (8) and the 3rd adsorption tower (9) passes through sequencing valve V12, sequencing valve V22 and sequencing valve respectively
V32 is connected with the entrance of condensation pipe (2), and the outlet of condensation pipe (2) is connected with storage tank.
4. natural qi exhaustion heavy hydrocarbon system according to claim 3, it is characterised in that：Flow control valve V4 entrance is further
Be connected to respectively by sequencing valve V13, sequencing valve V23 and sequencing valve V33 at the top of the first adsorption tower (7) between sequencing valve V11,
At the top of second adsorption tower (8) between sequencing valve V21, at the top of the 3rd adsorption tower (9) between sequencing valve V31；First adsorption tower
(7) between bottom and sequencing valve V12, between the second adsorption tower (8) bottom and sequencing valve V22, the 3rd adsorption tower (9) bottom and journey
It is connected respectively by sequencing valve V14, sequencing valve V24, sequencing valve V34 with the entrance of regeneration gas heating pipe between control valve V32.
5. natural qi exhaustion heavy hydrocarbon system according to claim 4, it is characterised in that：The outlet difference of regeneration gas heating pipe
Be connected to by sequencing valve V15, sequencing valve V25, sequencing valve V35 between the first adsorption tower (7) bottom and sequencing valve V14, second
Between adsorption tower (8) bottom and sequencing valve V24, between the 3rd adsorption tower (9) bottom and sequencing valve V34.
6. natural qi exhaustion heavy hydrocarbon system according to claim 5, it is characterised in that：At the top of first adsorption tower (7) with it is program control
Between valve V13, at the top of the second adsorption tower (8) between sequencing valve V23, at the top of the 3rd adsorption tower (9) between sequencing valve V33 point
It is not connected by sequencing valve V16, sequencing valve V26, sequencing valve V36 with the entrance of regeneration gas cooling pipe (1).
7. natural qi exhaustion heavy hydrocarbon system according to claim 6, it is characterised in that：The outlet of regeneration gas cooling pipe (1)
It is connected with the entrance of the second knockout drum (13), the top exit of the second knockout drum (13) is connected with flow control valve V4 outlet,
The outlet at bottom of second knockout drum (13) is connected with the heavy hydrocarbon port of export.
8. natural qi exhaustion heavy hydrocarbon system according to claim 7, it is characterised in that：Further comprise that cold and hot exchange can be carried out
Regeneration gas heat exchanger (10), the of heat can be absorbed from regeneration gas heat exchanger (10) by being provided with regeneration gas heat exchanger (10)
One heat exchange pipeline, and can be to exothermic second heat exchange pipeline of regeneration gas heat exchanger (10).
9. natural qi exhaustion heavy hydrocarbon system according to claim 8, it is characterised in that：The entrance of first heat exchange pipeline leads to respectively
Cross sequencing valve V14, sequencing valve V24, sequencing valve V34 be connected between sequencing valve V15 and sequencing valve V12, sequencing valve V25 and program control
Between valve V22, between sequencing valve V35 and sequencing valve V32, the outlet of the first heat exchange pipeline and the entrance phase of regeneration gas heating pipe
Even；
The entrance of second heat exchange pipeline is connected to the first adsorption tower by sequencing valve V16, sequencing valve V26, sequencing valve V36 respectively
(7) between top and sequencing valve V13, at the top of the second adsorption tower (8) between sequencing valve V23, at the top of the 3rd adsorption tower (9) and journey
Control between valve V33, the outlet of the second heat exchange pipeline is connected with the entrance of regeneration gas cooling pipe (1).
10. the natural qi exhaustion heavy hydrocarbon system according to claim any one of 1-9, it is characterised in that：First adsorption tower (7),
Second adsorption tower (8) and the 3rd adsorption tower (9) are provided with that one or two are adsorbent bed, and adsorbent bed is activated carbon
Layer.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988660A (en) * | 2019-05-07 | 2019-07-09 | 成都赛普瑞兴科技有限公司 | Natural gas purification system and natural gas purification method |
| CN114437843A (en) * | 2020-11-03 | 2022-05-06 | 中国石油化工股份有限公司 | Control system and method for natural gas treatment process |
| CN118142310A (en) * | 2024-05-11 | 2024-06-07 | 大庆市卓成石油科技有限公司 | Natural gas decarbonization hydrocarbon removal purification device |
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2016
- 2016-12-30 CN CN201621488061.8U patent/CN206352130U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109988660A (en) * | 2019-05-07 | 2019-07-09 | 成都赛普瑞兴科技有限公司 | Natural gas purification system and natural gas purification method |
| CN114437843A (en) * | 2020-11-03 | 2022-05-06 | 中国石油化工股份有限公司 | Control system and method for natural gas treatment process |
| CN114437843B (en) * | 2020-11-03 | 2022-12-13 | 中国石油化工股份有限公司 | Control system and method for natural gas treatment process |
| CN118142310A (en) * | 2024-05-11 | 2024-06-07 | 大庆市卓成石油科技有限公司 | Natural gas decarbonization hydrocarbon removal purification device |
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